Hospital corpsmen were previously trained at Naval Hospital Corps School, Great Lakes, Illinois until the 2011 Base Realignment and Closure Bill caused Hospital Corps School to be relocated to the Medical Education and Training Campus (METC) at Joint Base San Antonio, Texas.
characteristic of highness or lowness of a sound is called The frequency of a sound wave determines the pitch of the sound you hear. Remember that frequency is the number of waves passing a fixed point in a given period of time. A high-frequency wave with short wave-lengths, such as that produced by a tiny flute, makes a high-pitched sound.
The human ear is not equally sensitive to sounds (tones) of the same sound pressure levels but different frequencies. This subjective or perceived magnitude of a sound by an individual is called its loudness. The loudness of a sound is not equal with its sound pressure level and differs for different frequencies. In order to assess loudness of a sound the isophonic curves are explored.